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The 12-inch (305 mm)/40 caliber gun was developed after the Spanish–American War to use the new smokeless powder that had recently been adopted by the Navy. The Mark 3, gun Nos. 15–48 and 50–56, was constructed of tube, jacket, and eight hoops.
The meridian 68° west of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, North America, the Atlantic Ocean, the Caribbean Sea, South America, the Pacific Ocean, the Southern Ocean, and Antarctica to the South Pole.
A U.S. Army 68W "Combat Medic Specialist" (center-left, viewers right) in Afghanistan.Note that the only distinguishing feature is the medical pack on his back. Known administratively as "Combat Medic Specialist" (formerly "Health Care Specialist"), the primary role of combat medics in the U.S. Army is to provide medical treatment and, if necessary, combat casualty care to injured soldiers and ...
The 8-inch (203 mm)/45 caliber gun was developed after the Spanish–American War to use the new smokeless powder that had recently been adopted by the Navy. This gun was much stronger than its predecessor, the 8-inch/40 caliber gun, [1] which were incapable of handling the new powder.
The 8.8 cm SK C/35 gun weighed 776 kilograms (1,711 lb) and had an overall length of 3.985 meters (13 ft 0.9 in) with a vertical sliding-block breech. The gun fired a 9.5 kg (21 lb) projectile 88 mm in diameter, and the barrel is sometimes described as 45 caliber .
Owing to the interchangeability of the guns, the battleships fitted with the 14-inch/45-caliber guns often had guns of various Marks installed on each turret. [3] In the 1930s, the Mark 1, 2, 3, and 5 were upgraded to allow for increased charges and muzzle velocities, resulting in the Mark 8, 9, 10, and 12, respectively.